HABA Russian Cathedral Architectural Wooden Building Blocks - 55 Piece Set This set combines many of the domes and arches that Russian czars and religious leaders used in constructing buildings in Moscow and St. Petersburg. With blocks sets like these your child can unlock new parts of their imagination, while teaching them about other cultures and countries. Bring a little bit of Russian history home to the play room! Common building blocks may be regarded as the most simple of toys. That may be true, but the Master Builder Sets by HABA inspire the design of structures that honor creativity and imagination. This set has 16 different shapes and 55 pieces and measures 10 1/2'' x 4'' x 8''. Recommended for builders ages 5 and up. The blocks are of the highest quality and will stand up to the test of time, as well as the continued tests of children. Basic size: 2,5 cm; 1 inch.